Chapter 3 Port And Cable Information; Console And Auxiliary Port Considerations; Console Port Connections - Cisco IAD2801 Series Installation Manual

Port and Cable Information
This document provides information about cables needed to install your Cisco IAD2801. It includes the
following sections:
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Console and Auxiliary Port Considerations

The router includes an console port and an auxiliary port. The console and auxiliary ports provide access
to the router either locally using a console terminal connected to the console port, or remotely using a
modem connected to the auxiliary port. This section discusses important cabling information to consider
before connecting the router to a console terminal or modem.
The main difference between the console and auxiliary ports is that the auxiliary port supports hardware
flow control and the console port does not. Flow control paces the transmission of data between a
sending device and a receiving device. Flow control ensures that the receiving device can absorb the data
sent to it before the sending device sends more. When the buffers on the receiving device are full, a
message is sent to the sending device to suspend transmission until the data in the buffers has been
processed. Because the auxiliary port supports flow control, it is ideally suited for use with the
high-speed transmissions of a modem. Console terminals send data at slower speeds than modems;
therefore, the console port is ideally suited for use with console terminals.

Console Port Connections

For connection to a PC running terminal emulation software, your router is provided with an RJ-45 to
DB-9 adapter cable.
To connect the router to an ASCII terminal, use the RJ-45-to-DB-9 cable and a DB-9-to-DB-25 adapter.
The default parameters for the console port are 9600 baud, 8 data bits, 1 stop bit, and no parity. The
console port does not support hardware flow control. For detailed information about installing a console
terminal, see the
For cable and port pinouts, refer to the online document
Specifications. This document is located on Cisco.com.
OL-12433-01
Console and Auxiliary Port Considerations, page 3-1
Preparing to Connect to a Network, page 3-2
"Connecting to a Console Terminal or Modem" section on page
Cisco IAD2801 Series Integrated Access Devices Hardware Installation Guide
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C H A P T E R
Cisco Modular Access Router Cable
5-3.
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